The Application of Multidimensional Techniques to the Rapid Pyrolysis-GC Profiling of Synthetic Polymers

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Abstract
The use of pyrolysis-capillary gas chromatographic techniques for “fingerprint” identification of polymers typically results in very complex chromatograms, with relatively high densities of often uninformative peak groups occupying both extremes of the pyrogram. Under certain chromatographic conditions, the more volatile fragments will stack up in a poorly resolved mass at the pyrogram front while the heavy fragments can result in the undesirable lengthening of the chromatographic run time. This report will demonstrate that heartcutting, cold trapping, and backflushing techniques can be used to isolate and profile a relatively narrow retention “window” from these complex pyrograms, thereby permitting a reduction in chromatographic run times and a reduction of the pyrogram complexity. This technique could be especially useful for those applications requiring rapid preliminary screening of synthetic polymer samples.

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